首页 > 解决方案 > 如何从 activedirectory 方法中返回值

问题描述

我在一个查询 ActiveDirectory 的类中有一个方法。因此,我使用的是“activedirectory2”npm 包。我成功通过身份验证并将结果成功记录到控制台。

现在我已经实例化了我的类并尝试调用该方法,但我无法获得非空结果。

我尝试使用 getter/setter 以在实例化类后使 _result 值可用。我试图通过研究异步调用来解决我的问题,但显然无法提出正确的问题。

类活动目录

var ActiveDirectory = require("activedirectory2");

class AuthenticateWithLDAP {
   constructor(user, password){
     this._result = [];
     this.user = user;
     this.password = password;
     this.config = {
        url: "ldaps://someldap",
        baseDN: "somebasdn",
        username: this.user,
        password: this.password,
        filter: 'somefilter',
     }
     this.ad = new ActiveDirectory(this.config);
   }
   //Auth Method
   auth() {
     var result = this._result;
     this.config.entryParser = function(entry,raw,callback){
       if(entry.hasOwnProperty('info')) {
        result.push(entry.info);
        this._result = result;
      } 
      callback(entry);
     }
     this.ad.authenticate(config.username, config.password, (err,auth)=>{
      if (err) {
        //some error handling
      }
      if (auth) {
        this.ad.find(config,async (err, userDetails) => {
          var result = this._result;
          {
            if (err) {
              //some error handling
            }
            if(!userDetails) {
              console.log("No users found.");
            } else {
              this._result = result[0]; //I want this result!
              console.log('result: ', this._result); 
              return await this._result;
            }
          }
        })
      } else {
        console.log("Authentication failed!");
      }
    });
   }
//getter/setter
  get result(){
    return this._result;
  }
  set result(value) {
    this._result.push(value);
  }
}
module.exports = AuthenticateWithLDAP;

路由模块

const express = require('express');
const AuthwithLDAP = require('AuthenticateWithLDAP');
const router = express.Router();

router.post('/', async (req,res,next) => {
   let x = async ()=> {
        authwithldap = new AuthwithLDAP(req.body.user,req.body.password);
        return await authwithldap.auth();
    }
    x().then((res)=>{
      console.log('res: ', res); //always []
    })
})

我希望能够在我的 router.post 方法处理程序中使用 AuthenticateWithLDAP 类的 _result 值。实际上我只在 router.post 中得到 [] (空数组)。

您能否告诉我如何以某种方式更改值 _result,以便类的实例知道它并可以在类本身之外使用它。

非常感谢。

米查

标签: javascriptnode.jsactive-directory

解决方案


我不是 100% 确定,但我认为这应该可行。在您的代码中,您无法返回结果,因为返回是在回调中。有办法解决这个问题。

  1. 将回调传递给auth()方法(这很糟糕,因为回调很糟糕)
  2. 返回一个承诺并解决结果

我决定去兑现承诺。

var ActiveDirectory = require("activedirectory2");

class AuthenticateWithLDAP {
   constructor(user, password){
     this._result = [];
     this.user = user;
     this.password = password;
     this.config = {
        url: "ldaps://someldap",
        baseDN: "somebasdn",
        username: this.user,
        password: this.password,
        filter: 'somefilter',
     }
     this.ad = new ActiveDirectory(this.config);
   }
   //Auth Method
   auth() {
     return new Promise((resolve, reject) => {
       this.ad.authenticate(config.username, config.password, (err,auth)=>{
         if (err) {
           //Call reject here
         }
         if (auth) {
           this.ad.find(config,async (err, userDetails) => {
             var result = this._result;
             {
               if (err) {
                 //some error handling
               }
               if(!userDetails) {
                 console.log("No users found.");
               } else {
                 this._result = result[0]; //I want this result!
                 resolve(await this._result);
               }
             }
          })
         } else {
           console.log("Authentication failed!");
         }
       });
     });
   }
}
module.exports = AuthenticateWithLDAP;
const express = require('express');
const AuthwithLDAP = require('AuthenticateWithLDAP');
const router = express.Router();

router.post('/', async (req,res,next) => {
   /* This code can be simplifed
    let x = async () => {
        authwithldap = new AuthwithLDAP(req.body.user,req.body.password);
        return await authwithldap.auth();
    }
    x().then((res)=>{
      console.log('res: ', res); //always []
    })
   */
  (async () => {
     authwithldap = new AuthwithLDAP(req.body.user,req.body.password);
     var res = await authwithldap.auth();
     console.log('res: ', res);
  })();
})

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